wintrust.h: Added a new define for a provider function.

include/wintrust.h

@@ -303,6 +303,16 @@ typedef struct _CRYPT_PROVUI_FUNCS {
 extern "C" {
 #endif
 
+#if defined(__GNUC__)
+#define WT_PROVIDER_CERTTRUST_FUNCTION (const WCHAR []) \
+    {'W','i','n','t','r','u','s','t','C','e','r','t','i','f','i','c','a','t','e','T','r','u','s','t', 0}
+#elif defined(_MSC_VER)
+#define WT_PROVIDER_CERTTRUST_FUNCTION L"WintrustCertificateTrust"
+#else
+static const WCHAR WT_PROVIDER_CERTTRUST_FUNCTION[] = \
+    {'W','i','n','t','r','u','s','t','C','e','r','t','i','f','i','c','a','t','e','T','r','u','s','t', 0};
+#endif
+
 BOOL      WINAPI WintrustAddActionID(GUID*,DWORD,CRYPT_REGISTER_ACTIONID*);
 BOOL      WINAPI WintrustRemoveActionID(GUID*);
 BOOL      WINAPI WintrustLoadFunctionPointers(GUID*,CRYPT_PROVIDER_FUNCTIONS*);